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The levels of cache in a CPU are referred to as L1, L2, and L3. These designations signify the hierarchy and organization of cache memory that enhances the speed and efficiency of data retrieval and processing within the CPU.
L1 cache, which is the smallest and fastest, is placed closest to the CPU core. It stores the most frequently accessed data to minimize latency when the CPU needs to access this information quickly. L2 cache is larger than L1 and serves as a secondary source of quick data access, providing a balance between speed and capacity. L3 cache is even larger and is shared among multiple cores in the processor, helping to improve performance by allowing different cores to access a common pool of data as needed.
This tiered caching system ensures that the CPU can operate efficiently, maximizing performance while managing the different levels of data access speed and storage capacity.